<template>
    <div>
      <!--面包屑导航区域-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
      <!--卡片视图-->
      <el-card>
        <el-row>
          <el-col>
            <!--添加角色按钮区域-->
            <el-button type="primary">添加角色</el-button>
          </el-col>
        </el-row>
        <!--角色列表区域-->
        <el-table :data="rolei1st" border stripe>
          <!--展开列-->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                <!--渲染一级权限-->
                <el-col :span="5">
                  <el-tag @close="removeRightById(scope.row,item1.id)" closable>{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!--渲染二级和三级权限-->
                <el-col :span="19">
                  <!--通过for循环嵌套渲染二级权限-->
                  <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success" @close="removeRightById(scope.row,item2.id)" closable>{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                        {{item3.authName}}
                      </el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <!--索引列-->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
              <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
              <el-button size="mini" type="warning" icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
      <!--分配权限的对话框-->
      <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVIsible"
        width="50%"
        @close="setRightDialogClosed">
        <!--树型控件-->
        <el-tree show-checkbox
                 :data="rightslist"
                 :props="treeProps"
                 node-key="id"
                 default-expand-all
                 :default-checked-keys="defKeys"
                  ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVIsible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>
    </div>
</template>

<script>
import request from 'api/request'

export default {
  name: 'Roles',
  data () {
    return {
      rolei1st: [],
      setRightDialogVIsible: false,
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      roleId: ''
    }
  },
  created() {
    this.getRolesi1st()
  },
  methods: {
    async getRolesi1st () {
      const {data:res} = await request('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolei1st = res.data
    },
    async removeRightById (role,rightid) {
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if(confirmResult !== 'confirm') {
        return this.$message.info('取消删除！')
      }
      const {data:res} = await request(`roles/${role.id}/rights/${rightid}`,{},'delete')
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      this.$message.success('删除权限成功！')
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const {data:res} = await request('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      this.rightslist = res.data
      this.getLeafKeys (role,this.defKeys)
      this.setRightDialogVIsible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并且保存到defKeys数组中
    getLeafKeys (node, arr) {
      if(!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const {data:res} = await request(`roles/${this.roleId}/rights`,{rids:idStr},'post')
      if(res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesi1st()
      this.setRightDialogVIsible = false
    }
  }

}
</script>

<style scoped>

</style>
